Greenspan recognized the fact that
cutting entitlements is politically unpopular, but said that
the types of tax cuts Trump wants would be nearly impossible
without those cuts.

"Cutting social benefits or cutting entitlements is the
third rail of American politics. And I think the third rail
of European politics, everybody else's politics," Greenspan said.
"If we don't come to grips with that, we're not going to solve
this problem."